incubo

Etymology 1
.

Noun

 * 1) nightmare, incubus

Etymology 1
From.

Verb

 * 1)  to lie, sit, or settle in, on or upon; recline
 * 2) to sit upon to brood or hatch
 * 3) to abide in; to inhabit
 * 4)  to brood over
 * 5)  to weigh upon; to be a burden to
 * 6) to settle on; to attach to
 * 1) to settle on; to attach to

Etymology 2
From.

Noun

 * 1) one who lies upon something
 * 2) a spirit who watches over buried treasure
 * 3) incubus, nightmare

Etymology 3
Regularly declined forms of.